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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 118 · 40 questions
TalentJR

How to do it in your head (Make 10): Bonds to 10: 1 + 9, 2 + 8, 3 + 7, 4 + 6, 5 + 5. Bonds to 100: the ones make 10, and the tens make 9 (because the ones already gave one ten). If the number ends in 0, the tens make 10: 40 + 60 = 100.

NameDateTime takenScore ___ / 40
  1. 1.20 + ? = 100
  2. 2.7 + ? = 10
  3. 3.48 + ? = 100
  4. 4.1 + ? = 10
  5. 5.9 + ? = 10
  6. 6.28 + ? = 100
  7. 7.4 + ? = 10
  8. 8.53 + ? = 100
  9. 9.49 + ? = 100
  10. 10.75 + ? = 100
  11. 11.43 + ? = 100
  12. 12.60 + ? = 100
  13. 13.58 + ? = 100
  14. 14.11 + ? = 100
  15. 15.5 + ? = 10
  16. 16.42 + ? = 100
  17. 17.45 + ? = 100
  18. 18.83 + ? = 100
  19. 19.34 + ? = 100
  20. 20.3 + ? = 10
  21. 21.8 + ? = 10
  22. 22.16 + ? = 100
  23. 23.67 + ? = 100
  24. 24.81 + ? = 100
  25. 25.13 + ? = 100
  26. 26.61 + ? = 100
  27. 27.2 + ? = 10
  28. 28.36 + ? = 100
  29. 29.39 + ? = 100
  30. 30.68 + ? = 100
  31. 31.62 + ? = 100
  32. 32.50 + ? = 100
  33. 33.46 + ? = 100
  34. 34.27 + ? = 100
  35. 35.6 + ? = 10
  36. 36.69 + ? = 100
  37. 37.88 + ? = 100
  38. 38.80 + ? = 100
  39. 39.25 + ? = 100
  40. 40.59 + ? = 100

Answer key

  1. 80
  2. 3
  3. 52
  4. 9
  5. 1
  6. 72
  7. 6
  8. 47
  9. 51
  10. 25
  11. 57
  12. 40
  13. 42
  14. 89
  15. 5
  16. 58
  17. 55
  18. 17
  19. 66
  20. 7
  21. 2
  22. 84
  23. 33
  24. 19
  25. 87
  26. 39
  27. 8
  28. 64
  29. 61
  30. 32
  31. 38
  32. 50
  33. 54
  34. 73
  35. 4
  36. 31
  37. 12
  38. 20
  39. 75
  40. 41

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